Why is it important to choose a high quality nut for self-drilling anchor system?

Machining process of nuts

There are a number of different processes for nuts, including machining, forging and casting. Although each process has its own unique advantages and scope of application, most factories choose to use either 'forging' or 'casting'. So what is the difference between 'forging' and 'casting'?

Difference between Forging and Casting

Forging is the process of making a workpiece of a certain shape and size out of a metal material in a plastic state and changing its physical properties by means of hammering, etc.

Casting is a process in which metal is melted into a liquid and then poured into a mould, cooled and solidified, cleaned and then a casting of the required shape is obtained. Various types of objects with complex shapes can be made.

Comparison of the advantages and disadvantages of sand casting and forging processes

Processing Technic	Advantages	Limitations
Sand casting	1.    Complex structural parts can be cast 2.    Wide range of material sources and low cost	1.    Large number of work sequences and inconsistent quality 2.    Defects (shrinkage, locking holes) tend to occur in castings
Forging	1.    Refine grain size and improve strength 2.    Reducing internal organizational weaknesses 3.    Formation of a superficial layer of compact fibres to improve the toughness of the material	1.    High requirements for raw materials 2.    No complex shapes can be processed

Of course whether forging or casting is used, machining is required for subsequent processing and finishing to ensure the quality and accuracy of the nut.

Factors affecting the quality of the nut and the consequences caused

There are various factors that affect the quality of the nuts, mainly including materials, machining processes and design. 

Faulty material

Resulting in a nut with reduced strength and performance not meeting design requirements

Unreasonable processing technology

Will cause the nut cracking, rolling fold, peeling and other problems make the nut performance is not up to standard, serious parts will cause scrap

Unreasonable process design

Resulting in the thread type, size and other non-standard requirements, will cause a bad spin; serious parts will be scrapped

What are the advantages of choosing the high quality nuts？

Excellent corrosion resistance

It is well known that the underground environment is very harsh and contains a variety of acids, alkalis and salts and other chemicals that tend to have a corrosive effect on anchor rods. High-quality nuts have a better corrosion resistance and can work steadily in harsh geographical conditions for a long time, avoiding damage or failure of the system.

Equal strength to the standard value of the corresponding anchor bar's tensile strength

The stability and reliability of the entire anchor system is ensured by the equal tensile strength of the nut and the anchor bar in the anchor system. High quality nuts and anchor bars can withstand greater loads and are less prone to fatigue and fracture after prolonged use, thus increasing the durability of the anchor system.

High precision and high tightening power

High-quality nuts are designed for precision, with high internal threads and machining accuracy. In use, the high quality nuts provide better tightening of the anchor bars and prevent loosening or locking, thus ensuring the stability and safety of the entire anchor system.

Low maintenance costs

Self-drilling anchor systems are often installed in difficult-to-reach underground locations. Therefore, if low quality nuts are used, it is likely that the nuts themselves will be damaged or fail, requiring more frequent maintenance and replacement, increasing maintenance costs and time. Choosing a high quality nut will significantly reduce later maintenance costs.

In conclusion, when using the self-drilling anchor system, good quality nuts should be selected wherever possible. This will ensure the stability and safety of the whole system, while reducing later-stage maintain expenses and providing better economic benefits and value for the owner. If you would like more information on this subject, please contact us. The most professional technical team at your disposal.